105results about How to "Limit diffusion" patented technology

The invention discloses a preparation method and an application of a gypsum retarder. The gypsum retarder is prepared from a diacid or anhydride material and an ammoniacal material or L-aspartic acid; the retarder prepared by use of the preparation method is added to gypsum so as to increase the setting time of a gypsum building material and reduce the strength loss of a hardened gypsum body. The retarder is a water-soluble amino acid degradable polymer, has excellent biodegradability and is a green and environment-friendly polymer material. The molecular structure of the retarder contains a large number of groups such as carboxyl, carbonyl and acyl, and the groups can be combined with Ca<2+> into complexes so that the dissolution velocity of the gypsum can be reduced, the diffusion of Ca<2+> to gypsum crystals can be restricted and hydration of gypsum particles can be hindered, and therefore, the retarding effect of the retarder is realized. Meanwhile, the strength loss caused by structural degradation of gypsum holes due to a high water-gypsum ratio is reduced.

The invention belongs to the field of electrochemistry and discloses multiwalled carbon nanotube/sulphur/polyaniline composite cathode material, a preparation method thereof, and the application thereof to the preparation of lithium sulphur batterypositive plates. The material adopts multiwalled carbon nanotube/sulphur/polyaniline composite cathode material and a sandwich structure; multiwalled carbon nanotube/sulphur composite material is coated with conductive polyaniline through in-situ polymerization, so that the multiwalled carbon nanotube/sulphur/polyaniline composite cathode material is formed; the multiwalled carbon nanotube/sulphur composite material is prepared through chemical co-deposition. The method is simple in technology, low in cost and high in consistency and stability of products. The material is high in electronic and ionic conductivity and high in sulphur carrying capacity, and can be applied to the preparation of lithium battery composite positive plates; the positive plate is high in cycling stability and capacity retention ratio.

The invention discloses a lithium-sulfur battery using nitride/graphene as separation layers and a positive electrode and a preparation method thereof. The lithium-sulfur battery consists of a positive electrode, a diaphragm, an electrolyte and a negative electrode, wherein the positive electrode contains sulfur which is coated onto an aluminum foil; then, a layer of separation layer based on nitride/graphene is coated; due to the existence of the nitride and graphene in the separation layer; the conducting performance of the battery is improved; the diffusion of polysulfide can also be effectively inhibited, so that the shuttle effect can be effectively relieved; the electric chemical performance of the battery can be improved.

The invention discloses a method for preparing an oxide dispersion strengthened iron-based alloy, belonging to the field of powder metallurgy materials. The method comprises the following steps: mechanically ball-grinding Y and Ti element alloyed atomized iron-based pre-alloyed powder for 12-24h in air atmosphere, to prepare oxygen-containing powder in which oxygen is evenly distributed, and performing thermal consolidation forming and thermal treatment to obtain nano-oxide dispersion strengthened iron-based alloy. Oxygen in the ball-grinding atmosphere is introduced into the powder matrix through mechanical ball grinding, nano-scale oxide strengthening phase can be evenly precipitated from the alloy matrix through thermal consolidation forming and thermal treatment, long-time ball grinding can be avoided, and the mechanical alloying time of the traditional preparation technology can be shortened; the formed nano-oxide second phase is evenly distributed in the matrix in a dispersed manner, and the room temperature and high-temperature strength of the alloy can be effectively increased; the preparation technology is simple, and the prepared alloy has excellent room-temperature and high-temperature mechanical performances, and is suitable for industrial large-scale preparation.

The invention belongs to the field of electrochemical energy and discloses a nitrogen doped porous carbon/sulfur composite positive material as well as a preparation method and an application thereof in preparation of a lithium-sulfur battery positive plate. The nitrogen doped porous carbon/sulfur composite positive material disclosed by the invention is prepared by adopting a sulfur-ammonium chemical precipitation method; three-dimensional wedged nitrogen-containing porous carbon and sulfur particles form a core-shell structure, so that the electronic and ionic conductivity of the composite positive material are improved; meanwhile, the sulfur bearing capacity is also improved, dissolution and diffusion of polysulfides are limited, and thus the circulation stability and the capacity retention rate of a composite electrode prepared from the nitrogen doped porous carbon/sulfur composite positive material disclosed by the invention can be effectively increased. The preparation method can be used for accurately controlling the content of loaded sulfur without complex pretreatment and post-treatment procedures, so that the process cost is greatly lowered, the process operation is simplified, and the consistency and the stability of the composite material are improved as well.

The invention discloses a plasma generating device, which comprises a shell (12), a Helmholtz coil (11), a negative pole (9), and a positive pole (10); the interior of the shell (12) is a vacuum cavity; the Helmholtz coil (11) is arranged coaxial with the shell (12); the negative pole (9) is positioned in the shell (12); the positive pole (10) is positioned in the shell (12) and opposite to the negative pole (9); the negative pole (9) is of a hollow metal tube structure with an opening along the axial direction, the opening direction is opposite to the positive pole (10), and the negative pole (9) and the positive pole (10) are arranged parallelly. In the invention, high density and large area plasma plate is generated by adopting magnetic confinement linear hollow negative pole dischargemode, thus having enhancing plasma density by hollow negative pole, and forming the uniform plasma plate (13) with density being over 10<12>cm<-3>, geometric size being over 60cm*60cm and thickness kept around 2cm. The high density and large area plasma has enormous advantage in aspects such as material surface treatment, research on interaction between plasma and electromagnetic wave, etc.

The invention discloses a multi-layer electrode structure for a lithium sulfur battery and a preparation method thereof. The multi-layer electrode structure comprises a current collector (1) and a multi-layer covering layer attached to the current collector (1), wherein the multi-layer covering layer has a loose porous layer (2), a conductive skeleton layer (3) and a confinement layer (4) which covers an electrode surface, close to the current collector (1) along a direction perpendicular to the current collector (1). The loose porous layer in the multi-layer electrode structure has a large pore structure and a high porosity, and can fully contain a sulfur active material, electrolyte and a multi-sulfide-ion charge-discharge product; the conductive skeleton layer in the middle provides a high-activity reaction interface for a charge-discharge reaction of the lithium sulfur battery by using a large specific surface area; the confinement layer on the electrode surface limits the diffusion of multiple sulfide ions; and the multi-layer electrode structure provided by the invention solves the problems of low sulfur utilization rate and poor cycle stability under high sulfur content andhigh sulfur loading of the lithium sulfur battery.

The invention discloses sodium iron chlorophyllin-chitosan/sodium alginate microcapsules and a preparation method thereof. In the method, chitosan/sodium alginate is used as a capsule material, sodium iron chlorophyllin is used as capsule content, and the sodium iron (II) chlorophyllin is microencapsulated by an emulsification-gel method. The preparation method comprises: dissolving sodium iron chlorophyllin in sodium alginate solution at a certain concentration, adding the prepared solution in vegetable oil containing Span-60, and stirring at high steep and emulsifying for 20 minutes; dripping acetic acid aqueous solution containing 2.0-percent chitosan and calcium chloride, continuously stirring for 30 minutes, standing for 2 hours and removing an oil phase; and washing the microcapsules with petroleum ether and isopropanol for three times respectively, performing suction-filtration, and drying at room temperature to obtain the sodium iron chlorophyllin-chitosan/sodium alginate microcapsules. The chitosan which is a natural polysaccharide with high biocompatibility and biodegradability and the sodium alginate serve as sustained and controlled release agent and targeting preparation, the sodium iron chlorophyllin is encapsulated in the center of the microcapsules to be protected from instability caused by change in a light or placing condition, a new formulation is provided in pharmacy, and the microcapsules are suitable to be further developed and used as iron-supplying health-care food and new medicinal preparation for treating iron-deficiency anemia, and have a bright application prospect.

This invention discloses a method for dividing a data communication network and diffusing route information, in which, said data communication network includes multiple NE to be divided into different regions and the NE includes border NE, the method includes: configuring ports of said border NE in terms of domain ID, when a change happens to the route path in a domain, its route information is diffused to outside only when a predefined condition is met, when the route information of a domain in the border NE is changed and the accessibility of the NE is changed, its route information can be diffused to other domains by connecting with ports of other domains connected by said border NE.

The invention relates to a pine moth sex pheromone microcapsule and a preparation method thereof, belonging to the field of embedding technology for the pine moth sex pheromone microcapsule. The microcapsule comprises a microcapsule wall material and a microcapsule core material, wherein the microcapsule wall material is a prepolymer liquid formed by reaction among methyl methacrylate, methacrylic acid and an initiator, the microcapsule core material comprises pine moth sex pheromone and liquid paraffin, and pine moth sex pheromone is cis-5,trans-7-dodecadienal, cis-5,trans-7-codlemone, cis-5,trans-7-dodecadienyl acetate and/or cis-5-dodecadienyl acetate. The microcapsule provided by the invention has the advantages of sensitivity, specificity, high efficiency, a long lasting period, degradability, good biocompatibility, no pollution to the environment, low price, etc., can be used for population monitoring and large-scale trapping and killing and control of pine moth, is capable of accurately predicating next-generation population occurrence density and has good economic benefits and ecological benefits.

The invention relates to a Ge-Sb-Te Ge-enriched N-doped phase-change material for a phase-change memory. The Ge-Sb-Te Ge-enriched N-doped phase-change material for the phase-change memory, provided by the invention, comprises chemical components which accord with a chemical formula as follows: Nx[(Ge1+yTe)a(Sb2Te3)b]100-x, wherein y is more than 0 but not more than 3, x is more than 0 but not more than 35, a is equal to 1 or 2 and b is equal to 1 or 2. The phase-change material is a storage material which has a reversible phase change under the effects of external energy. When a magnetic control sputtering is adopted, atom percentage contents of all the components are adjusted through controlling a power supply power of each target material and each target position and the N2/Ar2 flow ratio so that phase-change storage materials with different crystallization temperatures, smelting points and crystallization activation energies are obtained. Compared with the traditional Ge2Sb2Te5 thin-film material, the Ge-enriched N-doped phase-change material provided by the invention has the advantages of higher crystallization temperature, better data keeping capability, better heat stability, lower power consumption and the like.

The invention discloses a fuel gas water heater. The fuel gas water heater comprises a heat exchanger. The heat exchanger is formed by a plurality of heat exchange sheets arranged in parallel and an end cover. The water heater comprises a water heater casing, a heat exchange body, a fire disc, an ignitor, a cold water pipe and a hot water pipe, wherein the heat exchanger is mounted in a condenser jacket. Compared with the prior art, the fuel gas water heater is higher in heat exchange efficiency, the energy utilization rate of the water heater is high, and the heat loss is less.

The invention discloses a cooking bench air curtain, which comprises a U-shaped opening-type or closed-type annular air pipe, wherein the air pipe is provided with an opening which is directly connected with an air outlet of a fan, and the upper surface of the air pipe is provided with an elongated air outlet forming the air curtain. The cooking bench air curtain is reasonable in structure, the oil smoke can be limited in the area of the cooking bench, and the dispersion of the oil smoke can be limited; the opening of the air pipe is directly connected with the air outlet of the fan, so that the problem of the inconvenience in installation caused by excessive pipelines can be effectively avoided.

The invention aims to provide a multistage resistive random access memory and a manufacturing method of the multistage resistive random access memory. The multistage resistive random access memory comprises a substrate, a bottom electrode, a resistive layer and a top electrode, wherein the substrate, the bottom electrode, the resistive layer and the top electrode are arranged from bottom to top in sequence. The multistage resistive random access memory is characterized in that an isolation layer is further arranged between the bottom electrode and the resistive layer. According to the multistage resistive random access memory and the manufacturing method of the multistage resistive random access memory, the nanoscale isolation layer is additionally arranged, so that the magnitude of a storage window of the resistive random access memory is increased to over 105, and the primary condition needed by multistage storage is met; electrochemical active materials are used as the top electrode, different resistance states are achieved under the condition of different voltage drives through the drifting character of the electrochemical active materials, and the purpose of multistage storage is achieved; in addition, due to the additional arrangement of the isolation layer, dissipation of oxygen ions in the movement process is reduced, the bottom electrode is effectively protected, and the stability of a device is improved. In addition, the manufacturing method of the multistage resistive random access memory is simple and easy to control.

The invention discloses a vortex ventilation method and system applied to a high space building. According to the vortex ventilation method, air entering an air inlet in a wall of the high space building passes through a guide plate at an outlet of the air inlet and is guided to flow to the same clockwise direction, then diffuses and flows to a working area in the form of vortex air flow, and thenis discharged through an air outlet in the top of the working area; since a columnar air vortex has obvious entrainment force, high-density pollutants accumulated on the lower portion of a room can be sucked into a roof exhaust device in an entrainment mode and discharged out of the room by using smaller ventilation volume, so that the air volume is effectively reduced, and the ventilation efficiency is improved; and through the convergence effect of vortex ventilation in a lower ventilation control area, the pollutants are limited to diffuse to an area outside the ventilation control area, and thus the overall indoor environment is effectively improved.

The present invention describes a method of polymerization comprising: providing a substrate; coating at least part of said substrate with a polymerizable composition; providing an electron beam capable of generating pulses of accelerated electrons; and applying said accelerated electron The polymerizable composition is polymerized by pulse irradiating the polymerizable composition. Under certain conditions, the polymerization is a heterogeneous polymerization.

The invention discloses a bundling device for straw bundling. The bundling device comprises a base; a winding groove is formed in the base; a winding motor is fixedly installed on one side of the winding groove; a winding roller is fixedly connected to the output end of the winding motor; a limiting rod is fixedly installed in the winding groove; a limiting roller is fixedly installed on the surface of the limiting rod; supporting frames and arc-shaped limiting plates are fixedly installed at the upper end of the base; the arc-shaped limiting plates are located between the supporting frames; supporting plates are fixedly connected to the upper ends of the supporting frames; supporting rods are fixedly installed at the upper ends of the supporting plates; a binding wire roller is fixedly installed between the supporting rods; a binding wire is wound around the surface of the binding wire roller; and a tightening ring is fixedly installed between the arc-shaped limiting plates. The bundling device is simple in structure and novel in design; and straws can be tightly fixed together in a bundling process and can be directly bundled, so that the straw bundling efficiency can be effectively improved.

The invention provides a silicon-based molecular sieve/carbon tube sulfur-loaded composite positive electrode material, a preparation method and an application thereof. The technical scheme is that the preparation method comprises the following steps: mixing and grinding a carbon tube and elemental sulfur, adding CS2 and fully stirring, after that, drying to obtain a carbon tube sulfur-loaded composite material; and mixing the carbon tube sulfur-loaded composite material with carbon black and polyvinylidene fluoride according to a certain mass ratio, then adding N-methylpyrrolidone and the silicon-based molecular sieve, stirring and performing ultrasonic dispersion to be uniform, controlling the viscosity to be 1,000 to 10,000cps to obtain slurry, uniformly coating the obtained slurry on acurrent collector aluminum foil with a thickness of 150 to 400mm, then transferring the aluminum foil to a drying oven at 40 to 60 DEG C to obtain the silicon-based molecular sieve/carbon tube sulfur-loaded composite positive electrode material. The preparation method disclosed by the invention is simple to operate and easy for large-scale production; the prepared silicon-based molecular sieve/carbon tube sulfur-loaded composite positive electrode material is used for a lithium-sulfur battery, so that the dissolution of polysulfide ions in liquid electrolyte in the charging and discharging process of the lithium-sulfur battery can be solved, a shuttle effect is effectively inhibited, and the coulombic efficiency and the cycling stability of the lithium-sulfur battery are improved.